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The Human Skeleton

Skeletal System - a body system made up of bones, joints and connective tissues.
Marrow - a soft tissue in the center of some bones.

Connecting Parts

Cartilage - A strong, flexible, gel like tissue that cushions your joint.
Tendons - Connect Muscles to bones.
Ligaments - Connect Bones to Bones.

Your skeletal system allows you to move.
There are 206 bones in the human body. A newborn has 350 bones.


What the Skeletal System helps?Edit

  • Supports the body by providing a framework for the body.
  • Protects the internal organs. Example: Rib cage protects your heart and lungs.
  • Stores Minerals. Example: Calcium and phosphorus.
  • Makes blood cells in the bone marrow.


Skeletal System
  • Cranium - Skull; Keeps the brain protected.
  • Clavicle - Collarbone; Keeps the scapula in place/maintains structure for the shoulder and the upper body.
  • Sternum - Long, flat, bony plate which protects the heart, lungs and blood vessels.
  • Scapula - Shoulder Bone; Connects the lower part of the body to the top of the body/maintains structure for the upper body and shoulder (flat bone).
  • Humerus - Arm; The long bone connects the scapula to the lower part of the arm (the ulna and radius)/maintains structure for the upper arm.
  • Ulna - The bone that stores minerals and makes blood cells in the marrow/allows movement through the elbow and the wrist.
  • Radius - Paired up with the Ulna and accomadates with the roatation of the forearm. The ulna also performs this function. Also maintains structure for lower arm.
  • Ribs - The ribcage serves to protect the heart and lungs, supports the torso and performs respiration (flat bone).
  • Vertebrae - Spine/Backbone; 33 ring-shaped bones stacked on top of each other to make the spinal cord/protects the spinal cord and provides support for the upper body (types of vertebrae are irregular).
  • Pelvis - Hip; Protects the organs of the pelvic cavity and supports the hips, thighs, and abdomen (legs).
  • Carpals - Helps with the movement of the wrist.
  • Femur - Thigh; Supports the weight of the body and accommodates in leg motion/Longest and heaviest bone.
  • Patella - Kneecap; Covers/protects the anterior articular surface of the knee joint.
  • Fibula - Stables the ankles and helps out with the muscles of the lower leg.
  • Tibia - Biggest bone in the lower leg; Shin bone which helps with the distribution of weight across the knee to the ankle/supports lower leg.
  • Tarsals - Helps with the distribution of force from the tibia to the heel bone.
  • Phalanges - Bones in the fingers and toes.


Joints is the point where to bones meet. Your fingers are a great example of joints, the so "cracking knuckles" is pulling away your joints.

Immobile, Slightly Immobile, and Mobile JointsEdit

Immobile joints are joints that can't move.

Examples are the Skull and Cranium.

Slightly ImmobileEdit
Slightly Immobile joints are joints that permit slight movement.

Examples: Between the vertebrae of the back.

Mobile joints are joints that permit wide movement joints.

Examples: Fingers

Connective TissuesEdit

Connective tissue is a strong, flexible tissue that cushions joints.

Tendons - connect muscles to bones.
Ligament - connect bones to bones.

Sprains/Diseases in relation with the Skeletal SystemEdit

Fractures - A break in a bone caused by an injury.
Dislocations - When a bone is pushed out of its joint.
Sprain - Stretching or twisting of ligaments. (Full definition: Ligaments are short parts of tough, flexible connective tissues that connects two bones, or cartilages, or holds together a joint)
Overuse - Injuries - occurs over time.
Scoliosis - A disorder where the spine curves in a "C" or "S" like curve/shape.
Osteoporosis - A disease where the bones are brittle.

Taking care of your skeletal systemEdit

A. Good Diary products contain calcium, phosphorus, magnesium, and Vitamin D. These vitamins help with the strenghtening of bones.
B. Regular Exercise: Increases Bone Mass.
C. Good Posture helps keep the spine healthy/in balance.
D. Take time to heal: Wait for it to be completely heal before returning back into physical activity.
E. Use protective gear when doing physical activities, such as riding your bicycle.


  • Notes

See alsoEdit